In a small pot, toast the star anise, cinnamon stick, and sliced ginger over medium heat for 2 minutes until fragrant.
Pour in the beef bone broth and fish sauce, then bring to a gentle simmer for 10 minutes to infuse the flavors.
While the broth simmers, cook the rice noodles in a separate pot of boiling water according to package directions, then drain.
Thinly slice the raw beef eye of round against the grain into paper-thin pieces.
Place the cooked noodles in a large bowl and top with the raw beef slices, sea salt, and black pepper.
Pour the boiling hot broth directly over the beef to cook it instantly, then garnish with bean sprouts, cilantro, Thai basil, scallions, and a squeeze of lime.